Karnasch 401020050 Hss-Xe Bi-Diameter Step Drill Bit, DIN 8376, 180°, Medium Degree for Step Hole, for Threads Ø M5, 5.5 mm Cutting Diameter, 13.0 mm Using Length, 10.0 mm

I wrote to Bigamart's customer support and they accompanied the process of reshipping the item until it finally arrived. I felt a genuine effort to solve the problem till it was finally solved.

The package was here in Australia from England in a few days — so quick! Something was missing and they refunded it straight away. Pretty happy with these guys.